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A022568 as a simple table

na(n)
01
13
26
313
424
542
673
7120
8192
9302
10465
11702
121046
131536
142226
153195
164536
176378
188896
1912306
2016896
2123045
2231224
2342048
2456310
2575000
2699384
27131072
28172071
29224910
30292774
31379608
32490338
33631104
34809472
351034814
361318707
371675344
382122176
392680602
403376728
414242432
425316562
436646272

[1,3,6,13,24,42,73,120,192,302,465,702,1046,1536,
 2226,3195,4536,6378,8896,12306,16896,23045,31224,
 42048,56310,75000,99384,131072,172071,224910,
 292774,379608,490338,631104,809472,1034814,
 1318707,1675344,2122176,2680602,3376728,4242432,
 5316562,6646272]